The schematic is in the appendix at the end of the document.
The most interesting part is the problem of energy collection without batteries. Currently, it provides energy collection by clicking buttons and solar energy collection. Ambiq Apollo3 for main control.
Hardware design is difficult, but Nordic is all open source, and PCB, BOM, Gerber, schematics, etc. are all provided. The schematic is also annotated.
This project started with STM32F1 and now it uses STM32F3.
Software and hardware are all open source
μSMUs are not meant to replace precision SMUs, but to complement them in cost-sensitive areas where accuracy is not required.
The SMU is a precision power supply device that can measure not only high-resolution voltage sources but also high-resolution current sources. It also integrates bipolar voltage and four-quadrant output functions to facilitate testing of various characteristics. By providing a linear sweep voltage and sweep current, the IV characteristic curve of the instrument can be obtained.
The Stanford Pupper is a four-legged robot designed to help K-12 and undergraduate students engage in exciting robotics research.
Label-free pose estimation from user-defined features via deep learning for all animals
CluonCV provides an implementation of state-of-the-art (SOTA) deep learning models in computer vision. It is designed for engineers, researchers and students to quickly prototype products and research ideas based on these models.
It is the first open source system to achieve 70+ mAP (75 mAP) on the COCO dataset and 80+ mAP (82.1 mAP) on the MPII dataset. To match poses corresponding to the same person in frames, an efficient online pose tracker called Pose Flow is also provided. It is the first open source online pose tracker to achieve 60+ mAP (66.5 mAP) and 50+ MOTA (58.3 MOTA) on the PoseTrack Challenge dataset. AlphaPose supports Linux and Windows.
Not only is it open source, the author also has a super-detailed record of the design process. The bandwidth of each analog channel is not reduced in order to reduce costs. Each channel has a bandwidth of 350MHz, and higher sampling rate support can be designed in the future. Thunderbolt USB4 interface, speed up to 1GB/s (8Gbps)
The biggest feature of testing the power consumption of IoT devices is the high dynamic range, a few uA in the sleep state and hundreds of mA in the transmitting state, and it supports dynamic switching of the measurement range. The open source power meter ZS1100A has a dynamic measurement range of 1uA to 1.5A, a resolution of 100nA, and an accuracy of 1% ± 200 nA, which is very good.
It adopts Qinheng's self-developed RISC-V microprocessor "Highland Barley V4" and integrates 2Mbps low-power Bluetooth on the chip. It is equipped with a blood oxygen and heart rate module, a nine-axis sensor, a motor drive module, a low-power touch detection module and a 0.96-inch high-definition IPS display to meet the application needs of general bracelets.
Open source material for the Arduino UNO Mini Limited Edition.
The X-NUCLEO-DRP1M1 expansion board allows evaluation of the features of the TCPP03-M20, as well as the required USB Type-C™ features and protection for VBUS and CC lines (for Dual Function Power Supply (DRP) applications)
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